I'm using Raspbmc. I'd like the display to actually go to sleep (not simply just screensaver) after 15 minutes, but I can't seem to find any option for that in the settings. Am I missing something?
There is an undocumented option in
/boot/config.txt that might help you:
Tried and tested under Raspbian "Jessie" (not Raspbmc). The display goes to sleep after about 10 minutes of inactivity. Source: https://github.com/raspberrypi/linux/issues/487
[Note that the Pi itself cannot sleep like grown-up PC-s do.]
Edit: Turns out that this trick does not work on more modern versions of the Pi hardware, such as the RPi 4. Similarly, new releases of various Pi OS-es may behave differently. Thanks to Dmitry Grigoryev for pointing this out. My answer is valid for old hardware (I tested it on the RPi 2) and old software such as Raspbian "Jessie".
Case 1 : for x11 with no auto start X
$ vim ~/.xinitrc xset s off # don't activate screensaver xset -dpms # disable DPMS (Energy Star) features. xset s noblank # don't blank the video device
Case 2 : for X11 with auto start X
Follow the instructions for Case 1, then
$ vim /etc/lightdm/lightdm.conf [SeatDefaults] xserver-command=X -s 0 -dpms cd ~/.config mkdir autostart cd autostart vim screensaver.desktop [Desktop Entry] Type=Application Exec=/home/pi/.xinitrc
Case 3 : bash without X
$ sudo vim /etc/kbd/config BLANK_TIME=0 POWERDOWN_TIME=0 $ sudo /etc/init.d/kbd restart
Update: now that DPMS issue is resolved, it is sufficient to set
xset dpms 900 0 0
on the command line (900 is 15 minutes in seconds) or
Section "ServerFlags" Option "StandbyTime" "15" EndSection
Before DPMS was working properly on the Pi 4, I used to install
xautolock which runs an arbitrary command as a screen locker. For instance, mine looks like this:
tvservice -o DISPLAY=:0 xev -geometry 1900x1200 | stdbuf -o0 grep Motion >&- tvservice -e "CEA 4"
The first line shuts down HDMI signal, making the TV go to sleep. The second line starts the "X event" tool in a window which is bigger than the screen, and waits until "Motion" is reported, that is, when the user moves the mouse inside the window (which is anywhere on the screen). Finally, the third line sets the HDMI mode back to the one I use, which is 1280x720.
xautolock itself is started from
xautolock -time 10 -corners +--- -cornerdelay 5 -noclose -locker bcmsaver
This means that the screen will be locked after 10 minutes, or after 5 seconds if the mouse pointer is "parked" in the top left corner.
bcmsaver is the name of locker script above. Depending on how you run
xautolock, you may need to specify the full path to the locker script, and use an
& to send
xautolock to the background.
In order to "ENABLE" power management options on Raspbian
sudo apt-get install xscreensaver
(might take a while to install)
You then find the screensaver application in Start > Preferences
Select the first tab Display Modes
Set Mode to "Blank Screen Only"
Set Blank After to "15" minutes"
Select the second tab Advanced
Enable Quick Power-Off in Blank Only Mode
I would recommend to leave Quick Power-Off in Blank Only Mode values for "Standby After, Suspend After and Off After" as default
Please note, that the screensaver daemon might not autostart on reboot